<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
					
					// 1. while
					var i=0
					while(i<5)
					{
						document.write("<h3>Hello world</h3>")
						i++
					}
					
					// 2. do-while
					var j=0
					do{
						document.write("<h3 style='color:red'>Javascript</h3>")
						j++
					}while(j<5)
					
					// 3. for语句
					for(var k=0;k<5;k++)
					{
						document.write("<h3 style='color:green'>for语句</h3>")
					}
				</script>
				<h1>乘法口诀表</h1>
				<script>
					document.write("<pre>");
					for(var i=1;i<=9;i++)
					{
						for(var j=1;j<=i;j++)
						{
							document.write(j+"*"+i+"="+(i*j)+"\t");
						}
						document.write("\n");
					}
					document.write("</pre>");
					
				</script>
			
		</script>
		}
	</body>
</html>
